Tool holder



.5. R. MOORE.

TOOL HOLDER.

APPLICATION FILED MAR.17, 192:.

Patwiifid July 18, 1322.,

a 7 06 MM M Z WM w my J a w J srarss JOHN R. MOORE or CHICAGO, rumors.

TOOL HOLDER.

Application filed March 17, 1921.

To all whom it may concern:

Be it known that I, JOHN R. Moonm a citizen of the United States residing at, Chicago, in the county of Cook and State of Illinois, have invented a new and uscitul'lmprovcnient in Tool Holders, of which the following is a specification.

My invention relates, more particularly, though not exclusively, to tool-holders for holding tools for cutting all kinds ot" threads, such as worm threads and acme threads. Furthermore, the invention has applicability to holders for shaper tools ttor cutting keyways and the like;

)ne of my primary objects is to provide a novel, simple and economical construction of tool-holder-of the type adapting the portion of. the holder of Fig. 1.

tion of the holder carrying the tool to beadjusted to different angles relative to the work to be operated on, and which shall involve the minimum number of parts.

Another of my primary objects is to provide a novel, simple and inexpensive construction of tool-holder of the so-called spring type wherein the cutting tool so supported that it bears'yieldingly. against the work and is adapted to be adjusted to vary the angle at which the tool extends relative tothe work. A. further-object in this connection is to provide a construction of the character last statech whereby the spring section of the holder may be adjusted, to cause the spring section to operate in line with the pressure exerted by the tool in opcrating on the work. in all the positions of angular adjustment of the tool relative to the work, thereby to insure equal pressure at both sidesof the cutter.

Another primary object of my invention is to produce clean-cut and smooth threads on the work even when the latter is formed of relatively soft and inferior grades of metal, such as steel; and other objects as will be manifest from the following description.

' Referring to the accompanying drawings:

Figure l is a plan view of my improved tool-holder, and in connection therewith a bar shownas' being operated on by a tool in the holder. Figure 2 is a view in side eleva- Figure 3 is a longitudinal sectional view through the holder, the'section being taken at the irregular line 8-3 on Fig. 4t and viewed in the direction of the arrows; and Figure 4 is a front end view of the holder.

I have chosen to illustrate my invention Specification of Letters Patent.

affording rammed July is, 1922. Serial No. 452,933. r i

as applied. to a holder designed more particularly, tor holding a thread-cutting tool. the particular construction shown, and con stitutingth preferred embodiment of my invention, comprising a shank 5 at which the holder is adapted to be secured in position on the machine in connection with which it is used, as for example in a tool-post on a lathe the torward end ot' the shank being prov1ded with a pivot-stud 6 extei'iding lengthwise of the shank and threaded; at its outer end. Pivotally supported on the stud 6 1s a spring membenor head, 7 shown as ot loop form and affording the legs ,8 and 9 dis connected at their lower ends. but connected at theirupper ends by the portion 1'0; The spring section 7 may be formed of any su t able material, preferably spring steel and afi'ords, between thc-legsS and 9 a recess 11. The leg 9 contains an opening 1.2 there through through which the pivotstud 6 extends and at which portion the section 7 is afforded pivotal support for the purpose of pivotal support of the section 7 on the shank 5. The threaded end of the pivotstud extends into the recess 11. and has screwed thereon a nut 13 between which and opening 18 in the leg and against the tool 16 The tool 16, may beof any desirable con struction the cutting edge thereoil' being represented at 19.

It will be understood from the foregoing that the angle at which the cutting edge 19 ofthe tool extends relative to the work. the latter being represented at 20, maybe varied as desired by loosening the nut 13 and rotating the section 7 on the shank 5. and set in such adjusted position bytightening up this nut. Thus in adjusting the section 7 to cause the tool to extend at its cutting edge 19 at right angles to the plane of the thread to be cut, the spring supported leg 8 is caused to extend in a direct line with the pressure exerted against the tool in the cutting operation, regardless of the angle to which the section 7 is adjusted on the shank 5, and thus this leg 'will yield in such direct line,

with the result of the pressure at the opposite edges of the tool, being maintained uniform and thereby eifecting the cutting of a clean and finished thread on the work.

It may be furthcrstated that, before commencing the cutting of the thread, the spring section 7 would be adjustedo'n the shank 5 at the pivot 6 to cause the cutting edge 19 to extend at right angles to the plane of the threads oi? the lead-screw (not shown but commonly provided) which produces relative movement of? the. work and tool-holder in the operation of the machine with which. it would be used, it being preferred that a scale be provided on the holder for :Eacilitat-.

1 relaing the proper setting 01'? thesection tive to the shank 5. In the construction shown such a scale is provided at :21 on the shank 5, it being graduated to degrees of a circle, and cooperating with this scale is a centralized mark 22, shown as a. line, on the spring section 7.

lVhile the invention has particular applicability to the cutting cl threads. it, may be also applied to holders for shaping tools wherein, as for example in the cutting of keyways, it is desired to adjust the tool relative to the work to avoid rubbing contact of the tool at its rear edge, or heel, against the walls of the grooves being cut.

Furthermore, it will be noted that the holder is formed of comparatively few parts, thereby permitting of the ready assembling thereof and the economical production of the device. In this connection it may be stated that the features of the device whereby it may be produced very economically, are not limited to embodiment in a structure wherein the section 7 is a spring section.

While I have illustrated and described a particular construction involving my invention, I do not wish to be understood as intending to limit it thereto as the samemay be variously modified and'altered without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is: 1. A. tool-holder formed of sections by one of which the holder is adapted to be supported, the other of said sections being a spring section adapted to support the tool, said spring section being adjustable upon'the other section about an axis extending lengthwise oi the latter, and means located at one end only of said firstreiterred-to section for adjustably securing said spring section to be adjusted as stated to vary its inclination relative to the work 2. A tool-holder formed of sections by one ofwhich the holder is adapted'to be supported, the other of said sections being a spring section adapted to support the tool, and means located at one end 'only of said first-referred-to section for adjustably pivin cutting the thread,

vary its inclination relative oting said spring section thereto on an axis extending lengthwise of said first-reterredto section and adapting said. spring section to to the work.

3. A tool -h older formed of sections by one of which the holder is adapted to be supported, the other o f said sections being a spring section adapted tosupport the tool, said spring section being oi loop form and adapted at one leg thereof to support the tool, and means located at one end only of said first-reterred-to section and engaging the other leg of said spring section for adjustably securing the latter thereto and adapting said spring section to be adjusted on an axis extending lengthwise of said firstreferred-to section to vary its inclination relative to the work.

4. A. tool-holder formed oi? sections by one of which the holder is adapted to be support ed. the other of said sections being a spring section adapted. to support the tool, said spring section-being of loop form and adapted at one leg thereof to support the tool, and mcanslocated at one end only of said first-reterred-to section and engaging the other leg of said spring section For adjustably pivotally securingthe latter there'- to on an axis extending lengthwise of said firstreterred-to section and adapting said spring section to be adjusted. to vary its inclination relative to the work. i

j 5. A tool-holder "formed of sections by one of which the ho'lder'is adapted to be supported, said'section being provided; at one en with a pivot stud extending lengthwise thereof, the other oi, said sections being a spring section adapted to supportthe tool.

said spring section being supported on said stud andadjustable about the latter to vary the inclination f the tool relative to the work. i

6. A tool holder formed of sections at one of which the holder is adapted to be supported, the other of said sections being supported on said first-referred-to section andadjustable thereon about an axis, said last-referred-to section containing'a slot or a tool extending lengthwise of said axis, with the upper wall 'oEsaid slot substantially in alignment with said axis, a tool located iii-said slot and fitting against the upper and lower walls of said slot with its cutting edge substantia'lly in alignment with said upper wall, and means securing said toolin said slot.

7. A tool-holder formed of 1 a shank at which the holder'is adapted to he supported and provided atone end with a threaded pivot-stud extending lengthwise thereof, and

a spring member adapted to support a tool pivotally supported on said stud. V

S. A tool-holder formed of a shank at which the holder is adapted'to be supported a spring member of loop form adapted at one le to support a tool and pivotally supported at its other leg on said stud.

9. A tool-holder formed of sections one of which contains a recess, and means con.- necting said sections together to permit of their relative adjustment on an axis at an angle to said recess, comprising a rotatable element in said recess and through the mediuin of which said sections are secured together in adjusted position.

10. A tool-holder formed of sections one of which contains a recess and an opening extending at an angle thereto, and means connecting said sections together to permit of their relative adjustment, said means extending through. said opening and into said recess, and through the medium of which said sections are secured together in adj usted position. i

11. A tool-holder formed of sections one of which contains a recess, and means conmeeting said sections together to permit of their relative adjustment on an axis at an angle to said recess, comprising a rotatable element in said recess and between which andthe other of said sections the one of said sections containing said recess, is clamped.

12. A tool-holder formed of sections one of which contains a recess and an opening extending at an angle thereto, and means connecting said sections together to permit of their relative adjustment, said means extending through said opening and into said recess and comprising an elementbetween which and the other of said sections the one oi said sections containing said recess, is clamped.

'13. A tool-holder formed of sections one of which presents a pivot-stud threaded at its outer end, the other of said sections containing a recess and an opening extending at an angle to said recess and opening into the latter, said stud extending through said opening and affording a pivot for said sec tion containing said recess, and a clamping nut'located in said recess and engaging the threaded end of said stud.

14. A tool-holder formed of sections one of which presents a pivot-stud threaded at its outer end, the other of said sections being of spring material and of loop form and presenting a recess, one of the legs of said loop section containing an opening into which said stud extends to form a pivotal support for said spring section, the other leg of said spring section being adapted to support a tool, and a nut located in said recess and screwed on said pivot-stud, for the purpose set forth.

JOHN R. MOORE. 

